Katia sits next to 4 phonetic neighbors — Katya, Katie, and Tia are the closest matches by sound. Most share Katia's Russian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pure"
"God's wonder"
"the end, high place"
"I see the sun, sun goddess"
"God is my oath"
"pilgrim to Rome"
"my God is Yahweh"
"flowing water, stream"
"born at Christmas"
"bright, radiant (from Slavic root)"
"I only want you"
"song, poem"
"my delight, my pleasantness"
"pure, unsullied"
"morning star, bright light"
"flower-like (from azalea)"
"pure"
"land of Amerigo Vespucci"
"devoted to the god of wine and festivity"
"alive, living, lively"
"blessed, happy one"
Similar sound: These names share phonetic patterns with Katia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek via Russian origins, giving them the same cultural heritage as Katia.
Rhythm: Katia is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.